南黄海盆地青岛坳陷二叠系、三叠系地震属性及其地质意义

新一轮的战略性油气地质调查工作在南黄海盆地崂山隆起新近系之下发现了疑似海相地层的有效地震反射，但因针对海相地层的勘探程度低（无井、地震测线稀）等原因，其地层属性至今依然不清楚。本文利用青岛坳陷有限的钻井资料，结合新采集有限的二维地震资料，对青岛坳陷二叠系、三叠系进行了地震属性提取及分析，认为其地震属性特征为：上二叠统龙潭组和大隆组总体表现为中-强振幅、偏低频、平行-近平行较密集地震反射;下三叠统下青龙组为中振幅、中-高频、平行-近平行密集地震反射;下三叠统上青龙组则为弱振幅或空白反射、低-中频、平行-近平行地震反射。预测上二叠统及中-下三叠统主要残存分布于青岛坳陷东侧靠近崂山隆起及勿南沙隆起的部位，并据此推测在崂山隆起及勿南沙隆起区可能残存，是值得探索的勘探领域。对于钻井稀少的低勘探程度区，利用地震多属性分析技术及地震属性特征来识别与预测勘探目的层的分布，对于早期勘探评价具有重要现实意义。

Seismic attributes of the Permian and Triassic in Qingdao depression,South Yellow Sea Basin and their geological significance

A new round of geologic survey on oil-gas resources recently discovered effective seismic reflection from suspected marine strata beneath the Neogene of Laoshan uplift in South Yellow Sea Basin. But its stratigraphic attribute remains unknown up to now because of the low degree of exploration in marine strata (no exploration wells and lack of seismic profiles). In this paper, we make a seismic multi-attribute analysis on the Permian and Triassic in Qingdao depression using the latest seismic data combined with limited drilling data (such as the WX5-ST1 well). The result shows that these seismic attributes are characterized by the mid-strong amplitude, low frequency, parallel-subparallel and relatively dense seismic reflection for the Permian Longtan and Dalong Formations; the mid amplitude, mid-high frequency, parallel-subparallel and dense seismic reflection for the lower part of the Lower Triassic Qinglong Formation, and the weak amplitude or blank reflection, low-mid frequency, parallel-subparallel seismic reflection for the upper part of the Lower Triassic Qinglong Formation. Therefore, it was predicted that the residual Upper Permian and Middle-Lower Triassic are mainly distributed in areas near Laoshan and Wunansha uplifts in the eastern Qingdao depression, which are worthy of further exploration. As for areas with the low degree of exploration, it is of great practice significance in early exploration and evaluation to identify and predict the distribution of exploration targets by applying the seismic multi-attribute analysis and seismic attribute characteristics.